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Finding the Fourth Proportional to 19,702, 27,189.12 and 11,320.48

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Solution

The fourth proportional to 19,702, 27,189.12 and 11,320.48 is: 15,622.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,702 : 27,189.12 = 11,320.48 : x
  2. Step 2: Convert to fraction form
    19,702/27,189.12 = 11,320.48/x
  3. Step 3: Cross multiply
    19,702x = 27,189.12 × 11,320.48
  4. Step 4: Simplify right side
    19,702x = 307,793,889.18
  5. Step 5: Solve for x
    x = 307,793,889.18/19,702
  6. Step 6: Final answer
    x = 15,622.47

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.